Roll paper cutter bar



July 20, 1937. c. D. PORTLE 2,087,529

ROLL PAPER CUTTER BAR Filed April 25, 1936 V Z "a 3 9 fF (3: a

CLUJ OrZZe Patented July 20, 1937 UNiTE STAT :5.

PATNT FFEQE 9 Claims.

This invention relates to a roll paper cutter bar and has relation more particularly to a device of this kind to be used in connection with a supporting stand for a paper roll.

It is an object of the invention to provide a cutter bar constructed and operating in a manner whereby the cut end portion of a paper roll is permitted to protrude beyond the cutter bar after a desired length of paper has been cut or torn off, such protrusion facilitating the desired grasping of the paper when it is desired to Withdraw another length of paper.

The invention also has for an object to provide a cutter bar having associated therewith means for mounting the same upon the posts or side members of a stand in 'a manner whereby the bar when in its lowered or working position with respect to the paper roll maintains substantially a fixed position at all times with respect to the roll irrespective of the decreasing diameter of the roll as the paper is drawn therefrom.

It is also an object of the invention to provide a cutter bar for a paper roll constructed and assembled in a manner whereby the bar may be maintained under a fixed pressure down upon the paper roll whereby is effected a binding upon that portion of the paper where it leaves the roll, thus assuring the paper of the roll being maintained firm and also to hold the paper drawn off of the roll in a manner to facilitate the tearing or cutting of the paper.

A still further object of the invention is to provide a cutter bar having associated therewith a supporting or mounting means permitting the cutter bar to be locked in a raised or inoperative position.

The invention consists in the details of construction and in the combination and arrangement of the several parts of my improved roll paper cutter bar whereby certain important advantages are attained and the device rendered simpler, less expensive and otherwise more convenient and advantageous for use, as will be hereinafter more fully set forth.

The novel features of my invention will hereinafter be definitely claimed.

In order that my invention may be the better understood, I will now proceed to describe the same with reference to the accompanying drawing, wherein Figure 1 is a view in perspective illustrating a cutter bar constructed in accordance with an embodiment of my invention, the associated stand for the paper roll being shown in fragment;

Figure 2 is a vertical sectional view taken through the structure as illustrated in Figure 1 with the cutter bar in a raised and locked position;

Figure 3 is a. fragmentary cross sectional View showing the cutter bar in contact with a paper roll.

As disclosed in the accompanying drawing, i denotes the side'posts or members'of a stand for a paper roll R, said roll to be rotatably supported between said posts or members I in any manner preferred.

The cutter bar C comprises a fiat top plate 2 of required dimensions and which has its outer or forward longitudinal marginal portion defined by an outwardly and downwardly inclined cutting blade 3. As is clearly illustrated in Figure 1, this cutting blade 3 is of a length coextensive with the length of the plate 2.

Each extremity of the plate 2 carries a depending end plate 4, the portion thereof immediately adjacent to the plate 2 being of a width less than the plate 2 and extending tothe rear longitudinal margin of the plate 2. The forward edge a of the plate i is substantially at right angles to the plate 2 while the rear edge I) converges toward said edge a on a predetermined angle.

Interposed between the end plates 4 and depending from the rear margin of the plate 2 is a back plate 5. This plate 5 terminates a material distance above the lower ends of the end plates 4 and, as is clearly illustrated in Figures 2 and 3 of the drawing, the lower longitudinal marginal portion 6 of the back plate 5 is disposed inwardly on a predetermined curvature to facilitate the drawing of the paper through the cutter bar C as is believed to be self-evident.

Connecting the lower portions of the end plates 4 is a guide plate 1. This plate I is inwardly ofiset with respect to the plate 5 and is on a plane substantially parallel to the plane of the upper portion of the plate 5. This guide plate I is also substantially coplanar withthe edge of the curved portion 6 of the plate 5 and spaced therefrom whereby is provided a slot 8 through which the paper passes. The upper marginal portion of the guide plate i is defined by an outstanding plate 9 extending entirely along the plate I and substantially parallel with the plate 2.

overlying the outer face of each of the end plates 4 and pivotally connected thereto, as at IU, are the outer portions of a pair of elongated arms II and I2. The opposite end portion of the arm H is provided with a longitudinally disposed slot I4 through which is freely directed the shank of a headed member I5 extending inwardly from a post or end member I of the stand whereby said bar II may have swinging move ment yet at the same time is capable of limit-ed endwise movement. The second arm I2 is pivotally connected at a fixed point IE to said post or end member I and when the member II is at the limit of its outward endwise movement as afforded by the slot I 4 and the member I5 disposed therethrough, the arms II and I2 are substantially in parallelism and free to swing upwardly and downwardly. This mounting and arrangement of the arms II and I2 assures the cutter bar C maintaining at all times the same relative position with respect to the roll R while in contact therewith and irrespective of the changing diameter of the roll as the paper is drawn therefrom.

The end portion of each of the bars I2 pivoted to the post or side member I is provided with a depending ear I! to which is pivotally connected, as at I8, an end portion of a rod'I9. This rod I9 is of a length to be freely disposed at all times through a bracket 26 extending outwardly from the inner face of the adjacent post or end member I. The upper portion of the rod I9 is enlarged to provide a shoulder 2| and interposed 1 between this shoulder 2| and the bracket 25) is an expansible member 22 of required tension herein disclosed as a coil spring encircling the rod I9.

It is to be particularly noted that when the arm I2 is in a horiontal position the pivots IS and I8 are in vertical alignment so that when the pivot I8 passes beyond the vertical center with respect to the pivot It the member or spring 22 will exert pressure upon the associated arm I2 to force the cutter bar C, and more particularly the back plate 5 thereof, into binding contact with the roll R. When the pivot I8 is in a position in advance of the vertical center of the pivot I6,

1 as illustrated in Figure 2, the tension of the spring 22 will serve to maintain the arm I2, and of course the cutter bar C, in its raised position to facilitate the replacement of a paper rolland the insertion of the paper through the slot 8. To effect this threading of the paper through the slot 8, the cutter bar C must be raised and tilted back so that the slot will be visible.

When it is desired to maintain the cutter bar C in a raised or inoperative position or, in other words, it is not desired to use the bar C, after the bar has been lifted, inward endwise movement is given to each of the arms II, as by a rearward swinging movement of the cutter bar C, which will result in the end portion of each of these bars I I remote from the cutter bar 0 being snugly engaged between the adjacent pivoted portion of a bar I2 and a transverse shoulder 23 provided across the associated post or end member I of the stand. This shoulder 23, as herein disclosed, extends only partially across the post or end member I so that no hinderance or obstruction will be offered to the desired swinging movement of the arm II when the cutter bar C is in working position.

This shoulder 23, as herein disclosed, comprises the lower edge face of a plate 24 suitably secured to the post or end member I and this plate 24 immediately in advance of the shoulder 23 is provided with an arcuate shoulder 25 with which the adjacent end of the shoulder 23 has sliding contact when the cutter bar C is in its lowered or working position. This shoulder 25 operates effectively to hold the arm II against limited endwise movement and thus assuring the maintenance of the cutter bar C in its desired position with respect to the paper roll when the cutter bar is in use.

As is believed to be clearly apparent to those familiar with devices such as the one herein disclosed, the free end portion of the paper of a roll is threaded through the slot 8 of the cutter bar C and it is to be noted that the blade 3 is positioned a sufficient distance in advance of the slot 8 and also of the plate 9 to assure such protrusion or extension of the'paper after a tearing or cutting operation to permit a ready grasping of the paper when it is desired to withdraw another length from the roll.

Although not shown it is to be stated that a suitable cover may be provided for coaction with each of the posts or end members I to house the rod IS, the spring 22 and the parts adjacent thereto.

It is to be particularly stated that the construction of the cutter bar C as herein disclosed is such as to assure the bar being strong and thus capable of effectively resisting the stress-es and strains imposed thereon when in use, and that the bar C is also of a construction which, after being once set, willrequire no adjustment or attention.

As is illustrated in Figure 3, it is to be noted that the point at which the paper leaves the roll R is higher than the cutting edge of the blade 3. This is of advantage as the paper can be torn or severed without the necessity of holding the outer portion of the withdrawn paper above the level at which the paper leaves the roll. In view of this the stand can be conveniently placed at a point higher than the counter level without minimizing the efliciency of the cutter bar C.

It is also to be noted that the entire weight of the cutter bar 0 always rests on the outermost surface of the paper roll. This is an important factor because without any special device or arrangement the cutter bar prevents any backward unraveling of the paper remaining on the roll and as the paper is unraveled it leaves the roll under pressure thus preventing backward or sideward movement of the paper which has been unraveled.

It is also to be particularly stated that the guide plate I together with its plate 9 are of importance as these elements provide means by which the outer or free end portion of the paper is held up and away from the roll and projecting out. from the roll at the proper angle so that the paper can be conveniently grasped. This plate I with its plate 9 serves effectively to prevent curling of the outer end portion of the paper. It is also to be noted that this plate I at no time rests upon the roll.

. From the foregoing description it is thought to be obvious that a roll paper cutter bar constructed in accordance with my invention is particularly well adapted for use by reason. of the convenience and facility with which it may be assembled and operated, and it will also be obvious that my invention is susceptible of some change and modification without departing from the principles and spirit thereof and for this reason I do not wish to be understood as limiting myself to the precise arrangement and formation of the several parts herein shown in carrying out my invention in practice except as hereinafter claimed.

I claim:- 1. A cutter bar structure for use in connection with a support for a paper roll, said structure comprising a bar carrying a cutting knife, a pair of arms pivotally connected with each end portion of the cutter bar, said arms having means coacting therewith to pivotally connect the same with the supporting structure for the paper roll, the means for pivoting one of said arms of each pair being so constructed and arranged to permit said arm to have limited endwise movement, and means coacting with the endwise movable arm when moved in one direction to hold the arms against swinging movement.

2. A cutter bar structure for use in connection with a support for a paper roll, said structure comprising a bar carrying a cutting knife, a pair of arms pivotally connected with each end portion of the cutter bar, said arms having means coacting therewith to pivotally connect the same with the supporting structure for the paper roll, the means for pivoting one of said arms of each pair being so constructed and arranged to permit said arm to have limited endwise movement, and means coacting with the endwise movable arm when moved in one direction to hold the arms against swinging movement, the pivotal connection between the arms and the cutter bar permitting the cutter bar to impose endwise movement to the endwise movable arm of each pair when the cutter bar is rotated about substantially its longitudinal axis.

3. A cutter bar structure for use in connection with a support for a paper roll, said structure comprising a bar carrying a cutting knife, a pair of arms pivotally connected with each end portion of the cutter bar, said arms having means coacting therewith to pivotally connect the same with the supporting structure for the paper roll, the means for pivoting one of said arms of each pair being so constructed and arranged to permit said arm to have limited endwise movement, means ccacting with the endwise movable arm when moved in one direction to hold the arms against swinging movement, and means coacting with the endwise movable arm for holding the same to prevent such movement when the cutter bar is in its lowered working position with respect to the paper roll.

4. A cutter bar assembly for use in connection with the supporting structure for a paper roll comprising a cutter bar, said cutter bar including a top plate having a blade disposed along its outer margin, end plates depending from the top plate, a back plate depending from the rear marginal portion of the top plate and terminating above the lower extremities of the end plates, the lower marginal portion of the back plate being disposed inwardly with respect to the end plates, a guide plate interposed between the end plates and positioned below the back plate to provide a slot for the passage of the paper as it leaves the roll, and means connected to the end plates of the cutter bar for engaging the same with the roll supporting structure, said means being constructed and arranged to allow the back plate of the cutter bar to contact with the paper roll.

5. A cutter bar assembly for use in connection with the supporting structure for a paper roll comprising a cutter bar, said cutter bar including a top plate having a blade disposed along its outer margin, end plates depending from the top plate, a back plate depending from the rear marginal portion of the top plate and terminating above the lower extremities of the end plates, the lower marginal portion of the back plate being disposed inwardly with respect to, the end plates, a guide plate interposed between the end plates and positioned below the back plate to provide a slot for the passage of the paper as it leaves the roll, and means connected to the end plates of the cutter bar for engaging the same with the roll supporting structure, said means being constructed and arranged to allow the back plate of the cutter bar to contact with the paper roll, said guide plate being also positioned in advance of the lower edge of the back plate.

6. A cutter bar assembly for use in connection with the supporting structure for a paper roll comprising a cutter bar, said cutter bar including a top plate having a blade disposed along its outer margin, end plates depending from the top plate, a back plate depending from the rear marginal portion of the top plate and terminating above the lower extremities of the end plates, the lower marginal portion of the back plate being disposed inwardly with respect to the end plates, a guide plate interposed between the end plates and positioned below the back plate to provide a slot for the passage of the paper as it leaves the roll, and means connected to the end plates of the cutter bar for engaging the same with the roll supporting structure, said means being constructed and arranged to allow the back plate of the cutter bar to contact with the paper roll, the cutting blade of the top plate being in advance of the guide plate.

7. In combination with roll supporting members for a paper roll, said members having transversely disposed straight shoulders continued by upwardly directed arcuate shoulders, a cutter bar carrying a cutting blade and having a slot rearwardly of the blade through which the paper passes after it leaves the roll, a pair of arms pivotally connected with each end portion of the cutter bar, means for pivotally connecting said arms to the roll supporting members below the shoulders thereof, the means for pivotally connecting one of said arms of each pair being so constructed and arranged toallow said arm to have limited endwise movement independently of its rocking movement, said bar when in position for swinging movement coacting with one of the arcuate shoulders to hold said arm against endwise movement, said arm when the cutter bar is raised having endwise movement between the first shoulder and the second arm to lock the cutter bar in raised position.

8. In combination with roll supporting members for a paper roll, said members having transversely disposed straight shoulders continued by upwardly directed arcuate shoulders, a cutter bar carrying a cutting blade and having a slot rearwardly of the blade through which the paper passes after it leaves the roll, a pair of arms pivotally connected with each end portion of the cutter bar, means for pivotally connecting said arms to the roll supporting members below the shoulders thereof, the means for pivotally connecting one of said arms of each pair being so constructed and arranged to allow said arm to have limited endwise movement independently of its rocking movement, said bar when in position for swinging movement coacting with one of the arcuate shoulders to hold said arm against endwise movement, said arm when the cutter bar is raised having endwise movement between the first shoulder and the second arm to lock the cutter bar in raised position, and tensioning means coacting with the second arm for initially holding the cutter bar raised and for pressing the cutter bar into contact with the paper roll when the cutter bar is lowered into working position.

9. A cutter bar structure for use in connection with a support for a paper roll, said structure comprising a bar carrying a cutting knife, a a pair of arms pivotally connected with each end portion of the cutter bar, said arms having means coasting therewith to pivotally connect the same With the supporting structure for the paper roll, the means for pivotally connecting one of said arms of each pair being so constructed and arranged to permit said arm to have limited endwise movement, and means coacting with the endwise moveable arm when moved in one direction tohold the arms against swinging movement, the pivotal connections for each pair of arms causing the cutter bar to maintain a fixed position at all times with respect to the roll irrespective of the decreasing diameter of the roll as the paper is drawn therefrom.

CLARENCE D. PORTLE. 

